Monitor Description
WARNING: This page is about a different car, the 2022 Toyota Avalon, 2021 Toyota Avalon, 2020 Toyota Avalon, and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
The ECM monitors its internal operation. If the internal operation is malfunctioning, the ECM will illuminate the MIL and store this DTC.